/*************************************************************************/
/*  scroll_container.h                                                   */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md).   */
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/*************************************************************************/

#ifndef SCROLL_CONTAINER_H
#define SCROLL_CONTAINER_H

#include "container.h"

#include "scroll_bar.h"

class ScrollContainer : public Container {
	GDCLASS(ScrollContainer, Container);

	HScrollBar *h_scroll;
	VScrollBar *v_scroll;

	Size2 child_max_size;

	void update_scrollbars();

	Vector2 drag_speed;
	Vector2 drag_accum;
	Vector2 drag_from;
	Vector2 last_drag_accum;
	float time_since_motion = 0.0f;
	bool drag_touching = false;
	bool drag_touching_deaccel = false;
	bool beyond_deadzone = false;

	bool scroll_h = true;
	bool scroll_v = true;

	bool h_scroll_visible = true;
	bool v_scroll_visible = true;

	int deadzone = 0;
	bool follow_focus = false;

	void _cancel_drag();

protected:
	Size2 get_minimum_size() const override;

	void _gui_input(const Ref<InputEvent> &p_gui_input);
	void _update_dimensions();
	void _notification(int p_what);

	void _scroll_moved(float);
	static void _bind_methods();

	bool _updating_scrollbars = false;
	void _update_scrollbar_position();
	void _ensure_focused_visible(Control *p_node);

public:
	void set_h_scroll(int p_pos);
	int get_h_scroll() const;

	void set_v_scroll(int p_pos);
	int get_v_scroll() const;

	void set_enable_h_scroll(bool p_enable);
	bool is_h_scroll_enabled() const;

	void set_enable_v_scroll(bool p_enable);
	bool is_v_scroll_enabled() const;

	void set_h_scroll_visible(bool p_visible);
	bool is_h_scroll_visible() const;

	void set_v_scroll_visible(bool p_visible);
	bool is_v_scroll_visible() const;

	int get_deadzone() const;
	void set_deadzone(int p_deadzone);

	bool is_following_focus() const;
	void set_follow_focus(bool p_follow);

	HScrollBar *get_h_scrollbar();
	VScrollBar *get_v_scrollbar();

	virtual bool clips_input() const override;

	TypedArray<String> get_configuration_warnings() const override;

	ScrollContainer();
};

#endif